Spark-plug cleaner



R H. SHELTON.

SPARK PLUG CLEANER. APPLicATloN FILED MAR. e, 1917.

Patented Feb. l0, 1920.

Ui-Wren snare B. ROY SHELTON, OF CHATTANOOGA, TENNESSEE.

SPRBPPLUG CLEANER.

Specification of, Letters latent.

Application filed March 9, 1917. Serial No, 153,609.

T all fr0/wm t may concern.'

Be it known that l, R ROY SHELTON, a citizen of the `United States, residingat Chattanooga, in the county of Hamilton and State of Tennessee, have invented certain new and useful improvements in Spark- Plug Cleaners, of which the following is a specification.

My invention relates to a device for cleaning spark plugs and the like by a sand and air process.

lt is well known that when once the interior porcelain member of a spark plug is cracked, the plug is of no further service.

lllith the present methods for cleaning the plugs, owing to being unable to thoroughly cleanthe porcelain, the cracks are very diiiieult to locate, and are therefore oi'ten the cause of unnecessary engine trouble.

After the spark plug has been cleaned by my method, it is very easy to' locate any de- 'lect in the same.

rlhereitore, the principal object of my invention is to provide a device which will thoroughly clean and remove the carbon from the interior of a spark plug.

W ith the above and other objects in view which will appear as the nature of my invention is better understood, my invention consists in the novel features hereinafter described, illustrated in the accompanying y the device.

Fig. g4 is a sectional plan view taken at the line 1f-#4 of Fig. 2.

Fig. 5 is an enlarged sectional view of the opening and closing portion of the device which controls the feeding of' the sand to the nozzle.

Fig. 6 is a' plan view of the nozzle looking down on Fig. 5.

ln the drawings 1 is a cylindrical sand chamber which is reduced in diameter at its upper end to iorm an air receiving conduit 2, to which, as shown, isA connected an air hose 3. Fixed on the outside of the air con duit 2 is a finger holder 4 which can be held by the operator when using the device.

The lowerend 5 ot the chamber 1 is provided with apertures (l and the casing beyoud the y end 5 is provided with a screw threaded ange 7 to receive the upper end 8 of the nozzle 9. rllhe inner end 10 of the nozzle is provided with ports 11 which will register with the apertures 6 in the end 5 when the nozzle is turned to the desired position.A Located between the end 5 of the chamber 1 and the end 10 of the nozzle, is a rubber washer 12 with holes 13 and which is held "firmly in position to register with the holes 6.

The portion 8- oi" the nozzle is provided at its lower end with a disk 14 and from which the nozzle tapers to a smaller opening at its extreme end 15. Close to the end oit the nozzle is a cup shape sand deilector 16 which is designed for the protection of the operators eyes.

Attached to the inner end of the conduit 2 and communicating therewith is a small air tube 17 which extends entirely through the sand chamber beyond the end 5, throuoh the washer 12 and the nozzle end 10 to wit iin a convenient distance of the end or" the nozzle.

On the disk 14 there is `a pointer or indi cator 18 which registers with similar marks 19 or 20 on the chamber 1, so that when the pointer 18 registers with point 20 by turning the disk 14, the sandwill be free to pass through the nozzle 9 owing to the holes 11 in the end portion 10 registering with the holes 6 in the chamber end 5. When the pointer 18 registers with 19, the valve formed between the nozzle and sand chamber will be closed and the sand retained in the chamber.

rlhe operation is as follows: A supply of line sand is placed in the chamber 1, this being accomplished by removing the nozzle and filling the sand through the holes 6 in lthe end 5 of the chamber 1. A supply of air is conducted through the hose 3 into the air conduit 2, this air being controlled in any convenient manner by a valve (not shown) adjacent the device. The disk 14 is then turned to allow the sand to pass from the chamber to the nozzle and thedevice held ina vertical position to assist the iow oic the sand toward the outlet. The air passing 'from the conduit 2 through the tube 17 will Patented Feb.. 10,192@

come intocontact with the exposed portion of sand between the end of the tube 17 and the extreme end of the nozzle 15, with the result that the sand will be forced out under pressure and at a high velocity. The spark plug may be held in one hand and the with the apertured end of said easing, a nozzle provided at its rear end with a screw threaded portion which adjustahly engages the screw threaded flange, the rear end of the nozzle being also provided with a series of spaced apertures designed to register with. the apertures of the easing When the nozzle is turned in one direction, the solid portions of the rear end of the nozzle between the nozzle apertures being adapted to close the easing apertures when the nozzle is turned in the opposite direction, an

air conduit connected to said easing at the end opposite the apertured end, a tube com munieating with said air conduit and eX- tending through said easing and nozzle and terniinatinff ad'acent the outlet end of said nozzle, and a sand defleetor fixed to said nozzle.

ln testimon7 whereof l have hereunto set my hand in the presence of two subscribing Witnesses.

R ROY SHELTON.

Witnesses J. 5B. Mam?, F. A. CHeMBERLIN. 

